caa a22 4500 397502737 CHVBK 20180308164536.0 cr unu---uuuuu 161202e19950101xx s 000 0 eng 10.1093/oxfordjournals.rpd.a082562 doi 0144-8420 pii (NATIONALLICENCE)oxford-10.1093/oxfordjournals.rpd.a082562 A Comparison of Two Methods for Estimating Effective Dose in Abdominal Radiology [Elektronische Daten] [N.W. Marshall, K. Faulkner, H.P. Busch, D.M. Marsh, H. Pfenning] The quantity effective dose has been estimated using two different techniques for radiological examinations of the abdomen. Initially, effective dose was calculated from measurements of entrance surface dose made with thermoluminescence dosemeters (TLD) used in conjunction with normalised organ dose factors. The circular field sizes set ranged from 14 cm to 40 cm in diameter when measured at the image intensifier input plane, whilst the standard film-screen technique used 35 cm x 35 cm film. Both anteroposterior and postero-anterior projections were studied at a nominal tube potential of 81 kV. The normalised organ dose data were measured using TLD and a Rando anthropomorphic phantom as a function of field size and projection. In the second method measurements of dose area product were used in conjunction with previously published factors to establish effective dose. For the method involving entrance surface doses and normalised organ dose factors, effective doses for male and female cases were deduced. The method involving dose area product, which does not distinguish between male and female patients, was in closer agreement for the male case. it was found that the effective doses calculated for the anteroposterior projection using this technique were, on average, 40% lower than those derived using the normalised organ dose data, however both techniques agreed to within 10% for the postero-anterior view. Radiation Protection Dosimetry Marshall N.W. aut Faulkner K. aut Busch H.P. aut Marsh D.M. aut Pfenning H. aut Radiation Protection Dosimetry Oxford University Press 57/1-4(1995-01-01), 367-369 0144-8420 57:1-4<367 1995 57 rpd https://doi.org/10.1093/oxfordjournals.rpd.a082562 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1093/oxfordjournals.rpd.a082562 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Marshall N.W. aut NATIONALLICENCE 700 1- Faulkner K. aut NATIONALLICENCE 700 1- Busch H.P. aut NATIONALLICENCE 700 1- Marsh D.M. aut NATIONALLICENCE 700 1- Pfenning H. aut NATIONALLICENCE 773 0- Radiation Protection Dosimetry Oxford University Press 57/1-4(1995-01-01), 367-369 0144-8420 57:1-4<367 1995 57 rpd Metadata rights reserved CC BY-NC-4.0 http://creativecommons.org/licenses/by-nc/4.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-oxford